Katayama

noun
Ka·​ta·​ya·​ma | \ˌkät-ə-ˈyä-mə \

Medical Definition of Katayama 

in former classifications

: a genus of Asian freshwater snails including important intermediate hosts of a human trematode worm of the genus Schistosoma (S. japonicum) and now considered part of the genus Oncomelania

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